Electric heating apparatus.



0. A. COLBY.

ELECTRIC HEATING APPARATUS.

APPLICATION FILED DEO. 5, 1910.

1,068,740. Patented Jui 29, 1913.

Q NVVENIO 7 ATTORNEY UNITED STATES PATENT onnion.

ORA A. COLBY, OF W'ILKINSBURG, PENNSYLVANIA, ASSIGNOR T0 WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

ELECTRIC HEATING APPARATUS.

Specification of Letters Patent.

Application filed December 5, 1910. Serial No. 595,677.

is a specification.

My invention relates to electric heating apparatus, and it has particular reference to containing vessels.

The object of my invention is to provide a device of the above indicated class which,

shall be simple and durable in construction, and particularly adapted to reduce the number of component parts and to facilitate the process of manufacture of electric heating devices of this type. 1

According to my present invention, I provide an electric heating device which embodies a containing vessel, a suitable cover therefor, and a heater unit which is provided with ahandle adapted to contain a suitable heater terminal member. Furthermore, the construction of the device is such that the heater unit is removably disposed within the vessel and may be secured in position by rotating the handle about the axis of the vessel, whereby the handle of the heater unit constitutes the handle of the entire device' Itv is manifest, therefore, that considerable reduction in cost of construction is eifected; a particularly useful device which may be readily taken apart and cleaned, is obtained; and adevice in which broken or defective parts may be easily removed and cheaply renewed, is provided.

My invention is illustrated in the accompanying drawings, 1 in which Figure 1 is a view, in side elevation, of an electric heating device constructed in accordance with my invention, certain portions being broken away for clearness, and Figfi2 is a plan view of the device shown in ig 1 Referring to the drawings in detail, an electric heating device 1 comprises'a containing vessel or receptacle 2, a cover 3 therefor, a heater unit 4, a terminal member 5, a handle 6 and a locking device 7. The receptacle 2, which is cylindrical in shape, is supported upon an integrally associated base 8 and is provided with an out- \vardly rolled upper edge 9 which partially surrounds the vessel. A wire ring 10 is disposed within the upper rolled edge "9 in order to lend rigidity thereto, and it will be observed that corresponding portions of the wire ring 10 and rolled edge 9 are removed to provide a break or opening 11, for a purpose to be hereinafter described.

The heater unit 4 is annular in form and Patented July 29, 1913.

may be of any suitable construction, al-

though I prefer aresistance element of the zig-za ribbon type interposed between suitabe sheets of metal which are welded together at their edges to form a watertight and durable unit. A hollow sheath 12 forms an integral part of the heater unit 4 and is provided with a bent neck portion 13 which engages the upper side of the rolled edge 9 and sustains the heater unit in position. The sheath 12 is adapted to accommodate a plurality of leads 14 which connect the heater unit 4 to the terminal member 5.

The terminal member 5 may be of any suitable construction, although I prefer a structure similar to that shown and described in detail in a co-pending application, Serial No. 568,871, filed June 25, 1910, by the Westinghouse Electric & Manufacturing Company, as assignee of William- S. Hadaway, Jr. Inasmuch as the structural details of the terminal member constitute no part of my invention, I consider it unnecessary to describe the same in the present application.

In order to-protect the terminal member 5 and to provide means for readily handling the heater unit 4, the insulating handle 6 is provided, said handle having a recess 15 to accommodate the terminal member 5 and its necessary connections and an end opening 15 through which a multi-conductor service cord 15 extends. A projecting portion, or hook, 16 is provided on the neck portion 13 and extends inwardly to engage the under side of the rolled edge 9, whereby the. heater unit 4 is rigidly secured in position in such manner that the handle. 6 constitutes a handle for the entire electric heating device. The cover 3 may, of course, be of any desired construction and is provided with a handle or knob 17 and a side opening 18, through which the neck portion 13 of the sheath 12 projects.

Assuming the component parts of the heating device to occupy the positions shown the. upper rollededge 9,, whereby the ha in the drawings, the heater unit 4 may be removed by revolving' the handle 6 about the axis "of the vessel until the projecting" ortion 16 coincides in position wltlnthe real; or opening 11 in the upper rolled edge flhe heater unit/L may then raisaiaaeia-emevtigeis win be rsaanynia derstood, the projecting. portion lfipas'sin'g through the opening 11 @In gassernbling, the d e,v ce,,-, heater 1 unit, a; .is placed within the- Vessel, and the handle 6 is moved sothat the projectingportion 16 .oc-

cupiesIa position corresponding to the open ing 11, when the heater unit 4 may be lowcr d nliOi as. n rmal, PQS fi 'Q -i lZhe han le 5 6 th n rotat d 1flbQl -tth th ve s l ineither? direction to cause cooperative engagement ,ofthe proj ectingpo1-tion -.1 .6 and ndle 6 is rigidly secured to the vessel'2. Z-.Altl1ough the. lockingdevice 7 is particularlyeffective, it is, of course, only lllustrative of many similar devices, and it is evident thatvarious other suitable devices for accomplishing the san e purposeimay bezemfployed. Furthermore, it will be under stood that variousother modifications in the structural details and -in' the arrangement 6 andlocation of parts may, be etfecte.dwith;-.

out departing from the spirit'of my invention, and I desire that all such modifications shall be included Within its'scope;

I claim 'as my invention: -51; An:.electr1c. heatingv device comprising a izco'ntainingi .vessel having a: laterally pro je'ict-ing rim 1 section, a -heater "unit. remov ably disp'osed in said. vessel, ailaterallypro je'cti-ngl terminal" member r1 gidly connected 2 to; said heater unit and providdwithmean for clamping said terminal memberto said rim section and detachable therefrom. by circumferential movement.

2. An electric heating device comprising :1. containing vessel, a heater un-it removably disposed therein, a' laterally projecting handleforsaid heaternnit, a terminal member disposed within'sald handle and means for I temporarily securing said handleto the rim of saidvessel, so that said handle constitutes a handle for the entire device.

3. A device compr sing a receptacle havingv a rolled upperedge provided with a gap,

ahea-ter'unit removably disposed in said re ceptacle, a laterally projecting terminal 55 member rigidly connected to said heater unit and located outside of said receptacle, a body of insulating material surrounding I said terminal memberand constituting a handle and a device projecting from said terminal member to engage the under; side of said rolled edge in'such' manner that said ,handle is rigidly secured to said receptacle except when said device registers with the l 'g'ap in the rolled edge.

A device comprising a containing vessel having a circumferential edge projection provided with a gap, a heater unist removably disposed in said vessel, alaterally projecting handle rigidly connected to said heater unit and having a recess therein to receive the terminals of said heaterunit and provided with a projection to engage the underside of the edge projection and, thus lock the handle to the rim of theVesselexcept-when registering with the gap inthe edge projection. a l I 6. The combination with a cylindrical veseel-having an outwardly projecting portion near its upper edge-and an'annular heater unit removably disposed. in said .vesselgsof a 1 handle for said heater unit adapted to contain the-terminals thereof and a projecting portion associated with said. "handle and adapted to cooperate with said outwardly projecting portion of said vessel, whereby the handle of said heater unit constitutes a handle for the-vessel. I

7. A receptacle comprising a containing vessel having an interrupted laterallypro jecting :rim, a removable electricwheating member disposed-insaid vessel, alaterally projecting handle for said heating member having means for engaging said rlm to-effeet locking and-unlocking engagement be-,

tween the-handle and the vessel as the handle is moved circumferentially with reference to the axis'of the vessel. 1

In testimony whereof, I have hereunto subscribed my name this 22nd day of -November,1910 i 3 w I ORA A. COLBY.

- Witnesses:

' BERTRAM D;- CoBNnR, B. B. HINES; 

